×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Thrust Block for watermain fitting
3

Thrust Block for watermain fitting

Thrust Block for watermain fitting

(OP)
Hello,
How do you calculate how much concrete you need for each bends on watermain installation? For example: how much CY of concrete do I need for 16" 45 degree bend?

Thanks for reading.

RE: Thrust Block for watermain fitting

The linked site may help. Link

RE: Thrust Block for watermain fitting

2
If you are new to piping, start your career off on the right foot. That would mean that you will rarely if ever use thrust blocks. The reasons for not using thrust blocks are explained here:

Link

Thrust blocks were generally used on unrestrained connections (bell and spigot) for underground work. Most piping is now restrained in some manner using restraints such as megalugs.

Thrust blocks have fallen out of favor because thrust block design is based on unknown characteristics of soils.

The preferred thrust restraint will be mechanical restrained joints. You should forget the thrust blocks and use these restrained pipe joints. Restrained pipe joint design will be simpler and the end results are more reliable as you do not know the soil conditions or the method that Contractor will use to install the thrust blocks. Most Contractors don't install thrust blocks properly, they typically just throw a bag of cement behind the elbow.

Thrust Block Design



RE: Thrust Block for watermain fitting

(OP)
Thank you for the response.
It is a requirement to install concrete thrust blocks by Engineers and SUDAS.
I am still looking for an answer on how much CY would you calculate for each bend? is there a formula?

Thanks again.

RE: Thrust Block for watermain fitting

Well then, put mechanical joints on as well as a thrust block. The link above titled "Thrust Block Design" has the information.

RE: Thrust Block for watermain fitting

I don't trust thrust blocks either - dig in accidents are all too common.
Fred

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close